Gapless Chiral Superconducting (d plus id)-Wave Phase in Strongly Correlated Layered Material with a Triangular Lattice : научное издание

Описание

Тип публикации: статья из журнала

Год издания: 2020

Идентификатор DOI: 10.1134/S1063776120010197

Ключевые слова: TRANSITIONS, SPIN

Аннотация: It is shown that interlayer electron tunneling in the quasi-two-dimensional ensemble of Hubbard fermions leads to the realization of the gapless superconducting phase with the chiral (d + id)-wave order parameter symmetry, not for a single value of sodium ion concentration, but in a wide range of concentrations. Precisely this situПоказать полностьюation corresponds to experimental data on the layered sodium cobaltite intercalated by water (NaxCoO2 . yH(2)O). Intra-atomic electron repulsion that determines the strong electron correlation regime leads to the representation of Hubbard fermions, the interaction of which ensures Cooper instability. Intersite intralayer interactions between fermions considerably affect the positions of nodal points of the chiral order parameter and change the critical concentration at which a topological transition occurs in the 2D system of Hubbard fermions.

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Издание

Журнал: JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS

Выпуск журнала: Vol. 130, Is. 2

Номера страниц: 235-246

ISSN журнала: 10637761

Место издания: MOSCOW

Издатель: PLEIADES PUBLISHING INC

Авторы

  • Val'kov V.V. (Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, Kirensky Inst Phys,Fed Res Ctr, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia)
  • Val'kova T.A. (Siberian Fed Univ, Krasnoyarsk 660041, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia)
  • Mitskan V.A. (Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, Kirensky Inst Phys,Fed Res Ctr, Krasnoyarsk 660036, Russia; Reshetnev Siberian State Univ Sci & Technol, Krasnoyarsk 660037, Russia; Reshetnev Siberian State Univ Sci & Technol, Krasnoyarsk 660037, Russia)

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